Eenst koeting



(No Model.)

E. KORTING.

VALVE GEAR. No. 888,290. Patented Aug. 21, 1888.

fiomst Kovtvh. 7 W ,1 (M W Fries,

nnnsr Kon'rING, OF HANOVER, PRUSSIA, GERMANY.

VALVE-GEAR.

SPECIFICATION forming part of Letters Patent No. 388,290, dated Au." e:21,1888.

Application filed January 3, 1888. Serial No. 259,585.

To all whom it may concern:

Be it known that I, Ennsr KORTING, a sub ject of the King of Prussia,residing at Hanover, Kingdom of Prussia, Germany, have invented new anduseful Improvements in Valve- Gears, whereof the following is aspecification.

My invention relates to the valvegear of powerengines that operate bymeans of an agent-such as steam, gas mixture, or the like-admitted intoand allowed to escape from the engine through the medium ofliftingvalves. More especially it regards the operation and time ofclosing the exhaust at variable points and the mechanism connected withthe valve upon whose point of closing depends the power developed by theengine. Heretofore the speed and power of engines have been regulated bythe admissionvalve of steam or gas to the power-cylinder.

My invention consists, first, in the combi nation, with the valve, oftwo reciprocating parts actuated by the engine and moving independentlyof each other, a pawl, and a spring or a weight, one of thereciprocating parts operating to open the valve, and the pawl keeping itopen until it is released by the other reciprocating part, whereupon thespring or weight closes it.

The invention consists, secondly, in the insertion between the said pawland the second reciprocating part, of a movable piece connected to agovernor and adapted to vary the distance which the second reciprocatingpart has to travel until it causes the valve to be released, the closingof the valve being thus brought about earlier or later, according to thespeed of the engine and amount of power required at the time.

Figure l of the annexed sheet of drawings represents a valvegearinvolving my invenvention. Fig. 2 shows modifications of parts thereof.

The aforesaid reciprocating parts consist in this case in the arm (2 ofthe lever (Z c and in the rod 7;.

a is the valve, 1; the stem thereof, and g the pawl.

The arm e of the lever (Z 6 extends into the path of a tappet, r, keyedon the shaftf, and which during its rotation operates to depress the arm6, and thereby to raise the arm (Z, and

(No model.)

the latter is connected by a pin, (2, to the valvestem 1), so that onrising it will lift the valve. For closing the valve a spring, 0, isattached with its respective ends to the arm (I and the box of the valveor any other stationary part. The spring may, however, also be fixedwith its upper end to the stem I), (see Fig. 2,) and in this case thearm d may be arranged to catch under the pin (1, so that it will onlyact from below on the same. The stem 1) has at the top a lateralprojection, I), forming a shoulder adapted to engage, when being in itshighest position, with the projection or shoulder h of the pawl g, whichis drawn by a spring, a, or a weight toward the stem b. \Vhen the valveis closed, the projection It bears against the projection b,- but assoon as the valve has been raised by the action of the tappet r on thelever d e, the pawl, by means of its projection or shoulder 71, catchesthe valve stem and keeps the valve open.

The rod k, constituting the second reciprocating part, which serves torelease the valve, is actuated by the eccentric s, keyed on the sameshaft which carries the tappet 1', the said rod being arranged to movetransversely to and in the plane of the pawl 9. Provided the rod be madelong enough to strike against the pawl and to be adapted to push itbackward, it will at a certain point of its course disengage theprojections h and b from each other, whereupon the valve is closed bythe spring 0.

If the time of closing of the valve is to be made dependent upon thespeed of the engine in view of reducing the power developed when thespeed is too great and of increasing it when the latter is below thenormal, a movable controlling-piece suitably guided is inserted betweenthe end of the red It and the pawl g and connected to the governordesigned to regulate the speed. The rod is is arranged to act on thepawl through the medium of the controlling-piece, and the latter is madeof such form that when the balls of the governor fly outward there willbe a decrease in the distance which the rod is has to travel until itacts on the pawl. In the arrangement shown by Fig. 1 the saidcontrolling-piece consists in an eccentric sector, '5, pivoted to thetop of the pawl and connected to the sliding boss of the governor m bythe rod 1) and the lever 0, the

smaller radius of the sector being at the bottom. In the modifiedarrangement represented by Fig, 2 the controlling-piece is constitutedby a wedge, i, being in sliding connection with the pawl and related tothe governor in like manner as the cam. Thus when the speed is too greatthe sector or the wedge will be depressed, and the rod 70 will operateat an earlier point of its stroke to release the valve, so that it mayclose.

I claim as my invention 1. A valve-gear for power engines, comprisingthe valve a, having the stem 1), with shoulder 1), the pawl g, withshoulder h, the springs c and n, or equivalent weights, and the tworeciprocating parts 01 and 7c, actuated by the engine, all combined andoperating together substantially as and for the purpose set forth.

ERNST KORTING.

Witnesses:

G. Liicrtren, JoHs. KRAOKE.

